Search Publications
The X-Ray Observatory Suzaku
Hamaguchi, Kenji; White, Nicholas E.; Isobe, Naoki +140 more
High-sensitivity wide-band X-ray spectroscopy is the key feature of the Suzaku X-ray observatory, launched on 2005 July 10. This paper summarizes the spacecraft, in-orbit performance, operations, and data processing that are related to observations. The scientific instruments, the high-throughput X-ray telescopes, X-ray CCD cameras, non-imaging ha…
Context Camera Investigation on board the Mars Reconnaissance Orbiter
Bell, James F.; Thomas, Peter C.; Wolff, Michael J. +11 more
The Context Camera (CTX) on the Mars Reconnaissance Orbiter (MRO) is a Facility Instrument (i.e., government-furnished equipment operated by a science team not responsible for design and fabrication) designed, built, and operated by Malin Space Science Systems and the MRO Mars Color Imager team (MARCI). CTX will (1) provide context images for data…
The Calibration of Mid-Infrared Star Formation Rate Indicators
Moustakas, J.; Roussel, H.; Leitherer, C. +25 more
With the goal of investigating the degree to which the MIR emission traces the SFR, we analyze Spitzer 8 and 24 µm data of star-forming regions in a sample of 33 nearby galaxies with available HST NICMOS images in the Paα (1.8756 µm) emission line. The galaxies are drawn from the SINGS sample and cover a range of morphologies and a fac…
The synthesis of the cosmic X-ray background in the Chandra and XMM-Newton era
Gilli, R.; Comastri, A.; Hasinger, G.
We present a detailed and self-consistent modeling of the cosmic X-ray background (XRB) based on the most up-to-date X-ray luminosity functions (XLF) and evolution of Active Galactic Nuclei (AGN). The large body of observational results collected by soft (0.5-2 keV) and hard (2-10 keV) X-ray surveys are used to constrain at best the properties of …
The Infrared Astronomical Mission AKARI*
Goto, Tomotsugu; Nakagawa, Takao; Shirahata, Mai +90 more
AKARI, the first Japanese satellite dedicated to infrared astronomy, was launched on 2006 February 21, and started observations in May of the same year. AKARI has a 68.5 cm cooled telescope, together with two focal-plane instruments, which survey the sky in six wavelength bands from the mid- to far-infrared. The instruments also have the capabilit…
Chromospheric Alfvénic Waves Strong Enough to Power the Solar Wind
Schrijver, C. J.; Ichimoto, K.; De Pontieu, B. +11 more
Alfvén waves have been invoked as a possible mechanism for the heating of the Sun's outer atmosphere, or corona, to millions of degrees and for the acceleration of the solar wind to hundreds of kilometers per second. However, Alfvén waves of sufficient strength have not been unambiguously observed in the solar atmosphere. We used images of high te…
The First Release COSMOS Optical and Near-IR Data and Catalog
Kneib, J. -P.; Aussel, H.; Sanders, D. B. +55 more
We present imaging data and photometry for the COSMOS survey in 15 photometric bands between 0.3 and 2.4 µm. These include data taken on the Subaru 8.3 m telescope, the KPNO and CTIO 4 m telescopes, and the CFHT 3.6 m telescope. Special techniques are used to ensure that the relative photometric calibration is better than 1% across the field…
The SAURON project - IX. A kinematic classification for early-type galaxies
Krajnović, Davor; Emsellem, Eric; van de Ven, Glenn +10 more
Two-dimensional stellar kinematics of 48 representative elliptical (E) and lenticular (S0) galaxies obtained with the SAURON integral-field spectrograph reveal that early-type galaxies appear in two broad flavours, depending on whether they exhibit clear large-scale rotation or not. We define a new parameter , which involves luminosity-weighted av…
The X-Ray Telescope (XRT) for the Hinode Mission
Weber, M.; Golub, L.; Peres, G. +26 more
The X-ray Telescope (XRT) of the Hinode mission provides an unprecedented combination of spatial and temporal resolution in solar coronal studies. The high sensitivity and broad dynamic range of XRT, coupled with the spacecraft's onboard memory capacity and the planned downlink capability will permit a broad range of coronal studies over an extend…
An Analysis of the Shapes of Interstellar Extinction Curves. V. The IR-through-UV Curve Morphology
Fitzpatrick, E. L.; Massa, D.
We study the IR-through-UV interstellar extinction curves towards 328 Galactic B and late-O stars. We use a new technique which employs stellar atmosphere models in lieu of unreddened "standard" stars. This technique is capable of virtually eliminating spectral mismatch errors in the curves. It also allows a quantitative assessment of the errors a…